I'm the same way. I would never take antibiotics on the premise that I might get sick...I'm a person that believes unless there is a problem, do nothing. Chickens like my goats, if you worm them for nothing the parasites start getting immuned to the wormer. I havent wormed mine since i started them back up here in TN. Been over a year.

Just checked out your RIR picture from June. Nice! Are those some of Matt's birds?